#include<stdio.h>
#include<math.h>
main()
{
    int nl,nm,i,j,flag,count=0;
    do{
        printf("Input START and END=?");
        scanf("%d%d",&nl,&nm);
    }
    while (!(nl>0&&nl<nm));
    printf("       PRIME TABLE(%d - %d)                   \n",nl,nm);
        if(nl==1||nl==2)
        {
            printf("%4d",2);
            nl=3;count++;
        }
    for(i=nl;i<=nm;i++)
    {
        if(!(i%2)) continue;
        for(flag=1,j=3;flag&&j<i/2;j+=2)
        if(!(i%j))flag=0;
        if(flag)
        printf(++count%15?"%4d":"%4d\n",i);
    }
}